cl_forcepreload 1 //Whether we should force preloading model and texture information to video memory at the beginning of a level. Makes level loads longer, but can reduce stuttering caused by loading information on the fly.

The autoexec.cfg you will have to make unless you already ahve one, goto C:\Program Files (x86)\Steam\SteamApps\common\left 4 dead 2\left4dead2\cfg (win x64Bit) or C:\Program Files\Steam\SteamApps\common\left 4 dead 2\left4dead2\cfg (win x32Bit) and right click and slect new text file inside of this copy and paste the preload cmd then save it, make sure you name it / save it as "autoexec.cfg" not {BAĞLANTI SİLİNDİ}autoexec.cfg/txt"

1.6Ghz Single Core! My phone is way more powerful than your PC :) Anyway... No changes, the FPS is as good as ever.

Still, this is an AGP card, 60 FPS max 5 minimum. Loading times are up 2 minute. Average 20 to 25 FPS in regular area's. Horde is 18 or less. Showing age but not flaws. A better rig will be noticed soon enough over my gameplay performance. Already good enough to make players annoyed.